Tricky issue on 1.5.1 today. My client rang me up in a panic asking me why thumnails were not showing when she uploaded new images to her image manager. I took a look and a few of the folders were like that, it would only show the alt text of the images.

I went into the server file manager and the file did upload but was just not showing. So I have cleared up the image cache and it seemed to do the trick. I also read elsewhere that turning off the error logs in the settings would also help which I am not to sure if it did or not.

But anyway she re uploaded a few files only for this issue to happen again. I am just curious if this is to do with corrupt images or if the filename of the file was too big... But if so why would images she uploaded before not show?

I am only new to opencart and how it works, so apologys if this has been asked before, I just cannot seem to find an answer. I will attach a screenshot of what i am talking about and see if you guys have experienced it.

The proble mhas been resolved once again for now but I would like to know what could be doing this? Any information will be helpful. Thanks guys.

I was having similar troubles recently, namely images not showing up in the manager or in my store, just the file name. I tried the various fixes mentioned above and elsewhere, including deleting the contents of image/cache, and deleting and re-uploading the files.

The fix for me was to shorten the file names and switch 'JPG' to 'jpg'. Not sure which was the issue exactly, but I suspect my long file names were to blame.

Sorry to bump this, but I am having this problem just today. The image upload successfully but there is no thumbnail in 'Image Manager' and it does not show elsewhere, I tried deleting cache and all that, but no luck.

I banged my head against the same problem for hours last night Deeco, nothing worked. Then on a whim, I logged in and checked my cPanel to see which version of PHP I was using. Apparently my host had it set on a very old PHP version! I changed it to PHP 5.4 and everything is back to working again.

I haven't seen this solution mentioned anywhere (I searched like crazy and tried a ton of other things), but this one actually worked for me. Good luck!

I have the same problem today. Suddenly images are not showing in image manager and the back-end of my store.
I'm still developing the store, the frond looks fine but i can't upload any images any more because they don't show up, just their names.I tried to upload .png,.gif,.jpg, nothing....I went through the forums to try to find a solution, a post...nothing that i haven't tried so far. I am running an openCart 1.5.6.4 on a linux server, PHP version is 5.4, haven't uploaded any weird modules (extensions) haven't touched the script in the file directory, only cleared the images of the demo openCart.
Although i am a new user (openCart) i have been working with online store software for the last 8 years (cs-cart) but i really can't solve this out.
All NEW ideas are more than welcome as long as you know the subject and you run the same version.
Thank you.

The only solution I've found is to use an image manager download from the extensions shop. You may have to pay for it but it solves the problem for now. Thumbnails still don't show in the products list in admin but at least you can see what you're uploading. I used Image Manager 2 + which works fine with 1.5.6.4.